"They are great! Very knowledgable service at a reasonable price!!" Jacquez - Verified Customer

"Both guys i spoke to in person, great customer service. Even 1st time on phone, very helpful." Mark - Verified Customer

"They are efficient and knowledgeable about cars and their honesty can't be beat." Cyrena - Verified Customer

Shop Message

We are a full service repair facility with the latest equipment and highly trained ASE Certified Master Technicians servicing and repairing all makes and models. We believe there’s no substitute for training. That’s why our technicians attend regular seminars to keep up with current technology. This translates to more efficient and accurate repairs because we have the knowledge to diagnose and repair your vehicle correctly the first time, on time, every time!

We also hold MACS certification for A/C diagnosis and service. We care enough about the environment to follow strict guidelines on Freon recovery. We also employ several factory trained technicians with backgrounds in BMW, Mercedes, Audi, VW, GM, and Hyundai. We have an edge over smaller shops with limited resources and allows our customers to have greater peace of mind when bringing their car to us.

Whether your vehicle is 30 years old or still under the manufacturer’s warranty, we’ll treat it like our own!

We're open Monday t

RepairPal's Assesment

Contra Costa Auto Service is the latest endeavor by Harold Dorton and his highly qualified team of professionals. Following in the footsteps of Harold's other 2 shops, this RepairPal Certiifed shop functions under the same successful model as the others. This auto repair facility is lead by ASE Certified Master Technician, Adrian Radu. Adrian has many years of experience as a BMW Master Technician. The team makes sure to stay up to date on the latest technologies by attending good quality automotive training, and have at their disposal some of the best automotive tools and computer diagnostic equipment that is available. Even though this shop was established in 2014, they have already developed raving fans. Their high levels of customer satisfaction was verified in our unbiased survey of their most recent customers, where they received a near perfect customer service score. The work they perform is backed by a 12-month / 12,000-mile warranty for your peace of mind. Local shuttle service, early bird drop off, Saturday hours, and a clean waiting area with wireless internet are available for your convenience.

At Diablo Subaru of Walnut Creek, we do not want you to work for your vehicle. We want to help you find the vehicle that works for you. We are convenience, availability and the quickest route to your next pursuit. From the daily commute, to the ends of the earth, owning a Subaru is a lifestyle. A lifestyle built on the freedom to explore all the things you love most. And that's not something that can be bought. Diablo Subaru of Walnut Creek. It's Who We Are!

At Concord Mazda of, we not only offer a superb selection of new and used Mazda models, but topnotch customer service. Our expert staff is ready to help you make truly informed decisions about everything from cars to service, service to parts.

We want you, and every one of our valued customers to feel welcome, comfortable, and to be thrilled with your new car purchase. PROJECT100 is "our commitment to provide 100% customer satisfaction to 100% of our customers - 100% of the time!" For you,PROJECT100 means that we will provide you with a better environment, a higher level of service, and VIP treatment.

There are 125 auto service shops and mechanics in Concord. Edit search

The shops listed below are not committed to the fair price guarantee and minimum warranty of RepairPal Certified shops. When taking your car to a shop that has not passed RepairPal’s inspection, we recommend that you: